Recyclable and Degradable Biomass-Based Water Vapor Sorbents for Efficient Atmospheric Water Harvesting

• DOI: 10.1021/acssuschemeng.3c06321
• Publication Date: 2024-01-06T14:24:53Z
• Authors: Mengchun Wu; Yunpeng Zhou; Sara Aleid; Xiaodan Tang; Yuyan Zhao; Renyuan Li; Peng Wang
• Keywords: Environmentally Friendly

Solar-driven sorption-based atmospheric water harvesting (SAWH) is an emerging freshwater production technology for alleviating increasing scarcity. However, existing vapor sorbents typically suffer from environmentally unfriendly synthesis processes or components. The development of efficient SAWH that are compatible highly demanded but remains a challenge. Herein, novel, eco-friendly, and degradable biomass-based sorbent developed the solar-driven via green approach by integrating hygroscopic choline chloride (ChCl) photothermal polydopamine into porous alginate matrices (denoted as D-sorbent). For first time, ChCl rationally chosen component, which imparts D-sorbent with high sorption capacity 0.72 g g–1 at 25 °C, 80% RH. exhibits ultralow desorption temperature 35 °C ∼99% sorbed can be released. In addition, shows stable performance after repeated use recycling. More importantly, fully made biomass resources, completely degraded nontoxic substances in soil, avoiding environmental burdens otherwise caused out-of-service sorbents.